bragg



(No Model.)

F. S. BRAGG.

SPARK ARRESTER.

No. 365,234. PatentedJune 21, 1887.

WITNESSESZ/ ATTORNEYS.

N. PETERS, Fhnlmljihographur. Waxhnglom D. C.

UNTTET) STATES PATENT OFFICE.D

FREDERICK S. BRAGO, OF OORNING, NFV YORK, ASSIGNOR OF ONEIIALF lO AUSTIN LATHROP, OF SAME PLACE.

SPARKARRESTEFL SPECIFICATION forming pari: of Letters Patent No, 365,234, dated June 2l, 1887. Application filed December-lil, 1F86. Serin] No, 2120.605. (No model.)

.'Z'o all whom, it may concern: netting by the exhaust of the steam from the Be it known that 1, FREDERICK S. BRAGG, pipes P, thc netting serving to arrest the of Corning, in the county of Steuben, in the sparks in the smoke-box. State of New York, have invented new and Cdcnotesthc cinderdischargespoutaltached 55 5 useful Improvements in Spark-Arresters for to the under side-of the smoke-box A, or its Locomotives, ofwhich the following, taken in extension A, the shell of which is provided connection with the accompanying drawings, with an opening, by which the said smoke-box is a full, clear, and exact description. comnmnicates with the spout. The lower end rIhis invention is a specific improvement of of the spout C has hinged to it a gate, D, which 6o Io the cinder-escape and draft-regulating devices is couuterbalanced, so as to normally stand in shown in my Patent No. 325,907, dated Sepa position to close the spout. Said spout is tember 8, 1885, and also shown in a modified located intermediate the length ofthe smokeformin apendingapplicatiouforpatcnt, Serial box or its extension preferably nearer to the No. 218,257, filed November 8, 1886. In either front end thereof than the smokestack I, so as 65 15 of the said prior devices the air-inlet was made to obtain sufficient room between the spout O to communicate with the sinoke-box through and flue-sheet B to allow the cindcrs to cool the medium of the cinder-discharge spout. before they reach the spout.

Although I have derived great advantages Between thc spout O and front end of the Vfrom the aforesaid arrangement of parts, yet smokebox extension A thc bottom or lower 7o 2o by practical experience I have found that by portion ofthe latter is provided with the airmaking the air-inlet to the smoke-box below inlet port L, and with a damper, a, by which the screen or wire-netting, as heretofore, but t0 control the ingress of air to the interior of separateanddistinctfrom theciuder-discharge the smoke-box. The result of this arrangeopeniug or spout, I not only enhance said adment is that when the engine is in lnotion the 75 2 5 vantages, butalso render my invention appliinilowiug air 'current (represented by arrows cable to a locomotive smoke-box without disin the drawings) partly drives the heat back turbing the existing cindcr-spout; hence my against the liuc-sheet, and thus augments the present invention consists, essentially, in the heating capacity of the boiler. At the same combination, with the smoke-box ofa locomo` time the fine dust is allowed to be drawn up 8o 3o tive, of a cinder-discharge opening and an air through the screen or netting N and escape inlet separate and distinct from the aforesaid through the stack, as indicated by the iine opening and below the screen, as hereinaften broken lines in Fig. 1 of the drawings, while more fully described, and specifically set forth the cindcrs (represented by heavy dots) are cast in the claims. forward by the draft of the smoke-stack and 8 5 3 5 In thc accompanying drawings, Figure 1 is final] y enter the spout O. The cool air current a side elevation of a locomotive smoke-box, sweeping over the cindcrs in their approach partly shown in section to bettenillustrate my to the spout serves to cool the cindcrs. They invention; and Fig. 2 is an enlarged detached can be discharged from the spout O whenever longitudinal sectional view of the spring-coupdesired by opening the gate D, and thus the 9o 4o ling by which the damper of the airinlct is smoke-box can be kept comparatively cleaned connected with its operating-lever. from cindcrs while the engine is in motion. A represents the smoke-box of alocomotive, Aside from this advantage the draft through formed with the front extension, A@ which is the stack can be moderated at will by opening at present coming into extensive use on coalto a greater or less extent the damper a ofthe 95 45 burning locomotives. A wire-netting, N, is air-inlet Ii, and by the moderation ofsaid draft extended across the upper part of the smokeeconomyin the consumption offuel is obtained. box, and reaches from the flue-sheet B part I do not limit my invention to the location way into the smoke-box extension A', and the of the air-inlet L in the bottom of the smokenozzles of the exhaust-pipes l. project through box or its extension, as it is obvious that a like roo 5 the netting N from the under side thereof, so or similar effect can be produced by locating as to produce a suction upward through the the said inlet at or near the base of the front end plate, d. It is, however, essential to locate said inlet below the spark-arresting screen or diaphragm, and its best location is between the cinder-spout and front end of the smokebox.

The gate D and damper a, I 4control by one and the same rod, f, connected with two bellcranks, g h, one of which latter has one arm connected with the gate D by a rod, r, and the other bell-crank has one of its arms connected with the damper a by a spring-coupling, e, the construction of which is shown in'detail in Fig. 2 of the drawings.

The connection of the bell-crank g with the controlling-rod f has suicient play to allow said rod to open the damper a to a` certain eX- tent Without moving the gate D, and a further movement of the rod f then opens the said gate, the spring-coupling i permitting said further movement of the rod f without strain of the damper a.

Having described my invention,what I claim as new, and desire to secure byLetters Patent,

1. The combination, with the smoke-box of alocomotive provided with thespark-arresti ng screen or diaphragm, of a cinderdischarge opening,and an air-inlet to said smoke-box below the screen and separate and'distinct from the cinder-discharge opening, as set forth.

2. The combination, with the smoke-box of a locomotive, provided with a spark-arresting screen or diaphragm, of a cinder-discharge opening, and an air-inlet to said smoke-box at the front end thereof and'below thel spark-arresting screen or diaphragm, asset forth and shown.

3. 'Ihe combination, with the smoke-boX of a locomotive, of a cinder-discharge spout provided with a gate, an air-inlet separate and distinct from said spout, a damper connected with the air-inlet, levers for operating said gate and damper, and a controlling-rod connected with the aforesaid levers, substantially as described and shown.

In testimony whereof I have hereunto signed my name and affixed my seal, in the lpresence of two attesting Witnesses, at Corning, in the county of Steuben, in the State of New York, 

